CN111093812A - Hollow fiber membrane module and filtration method - Google Patents
Hollow fiber membrane module and filtration method Download PDFInfo
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- CN111093812A CN111093812A CN201880041118.5A CN201880041118A CN111093812A CN 111093812 A CN111093812 A CN 111093812A CN 201880041118 A CN201880041118 A CN 201880041118A CN 111093812 A CN111093812 A CN 111093812A
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- hollow fiber
- fiber membrane
- hollow
- adhesive fixing
- fixing portion
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- 239000012510 hollow fiber Substances 0.000 title claims abstract description 264
- 238000001914 filtration Methods 0.000 title claims description 18
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- 230000001070 adhesive effect Effects 0.000 claims abstract description 105
- 239000000463 material Substances 0.000 claims abstract description 95
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- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 238000011085 pressure filtration Methods 0.000 description 3
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
- B01D63/04—Hollow fibre modules comprising multiple hollow fibre assemblies
- B01D63/043—Hollow fibre modules comprising multiple hollow fibre assemblies with separate tube sheets
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
- B01D63/031—Two or more types of hollow fibres within one bundle or within one potting or tube-sheet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
- B01D63/033—Specific distribution of fibres within one potting or tube-sheet
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/004—Seals, connections
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Manufacturing & Machinery (AREA)
- Artificial Filaments (AREA)
Abstract
The present invention is provided with: a hollow fiber membrane bundle; a housing; a first adhesive fixing part and a second adhesive fixing part which are used for adhering and fixing the hollow fiber membranes and the hollow fiber membrane bundle and the inner wall of the shell through resin materials at two ends of the hollow fiber membranes; and a regulating member (40) for regulating the arrangement of the hollow fiber membranes, wherein, when a range of a circle having a center of the end face and a radius of 1/2 of the radius of the end face as a center portion and a range other than the center portion as an outer peripheral portion is defined as a range of a circle having the center of the end face as a center portion and the radius of the end face as a radius on the end face outside the housing of at least one of the first adhesive fixing portion and the second adhesive fixing portion, a ratio between an area ratio of the regulating member (40) and the potting material to an entire area of the center portion and an area ratio of the regulating member (40) and the potting material to an entire area of the outer peripheral portion is 0.8 to 1.2.
Description
Technical Field
The present invention relates to a hollow fiber membrane module used in a filtration apparatus for removing turbidity, bacteria, and the like from a large amount of raw water such as river water, lake water, underground water, sea water, domestic sewage, factory sewage, and the like, and a filtration method using the hollow fiber membrane module.
Background
Hollow fiber membrane modules are generally classified into an internal pressure type and an external pressure type. The external pressure type hollow fiber membrane module is generally prepared by bundling several hundred to several ten thousand hollow fiber membranes having a length of 200 to 3000mm and an outer diameter of 0.1 to 5mm, storing the bundled hollow fiber membranes in a cylindrical housing, and bonding and fixing both end portions thereof to the inner wall of the housing with a potting material (adhesive). When both ends are bonded and fixed, there are two types of components: one is a one-end water-collecting type module in which the hollow fiber membrane is opened at one of the adhesive fixing portions and the hollow portion is sealed at the other adhesive fixing portion, raw water is supplied under pressure to a region sandwiched between the two adhesive fixing portions to permeate the hollow fiber membrane, and the filtered water is taken out from the adhesive fixing portion in which the end portion of the hollow fiber membrane is opened; the other is a two-end water collection type module which opens the ends of the hollow fiber membranes at two adhesive fixing portions and takes out the permeate from both ends. The adhesive fixing portion on the lower side in use is provided with a plurality of through holes and is used as a supply port of water to be treated in filtration treatment, an air supply port in a physical cleaning process, and a cleaning waste water outlet.
When such an external pressure type hollow fiber membrane module is used for the purpose of sterilization and turbidity removal, cross-flow filtration is generally performed to prevent accumulation of suspended substances on the surface of the hollow fiber membrane, or physical cleaning such as backwashing and air washing is periodically performed to recover the filtration performance, so that stable filtration operation can be performed.
In the external pressure filtration treatment, water to be treated containing suspended matter is supplied from the through-hole provided in the lower adhesive fixing section, and concentrated water is discharged from the nozzle provided in the upper side surface of the casing. In addition, when cleaning is performed by air washing, air is supplied from the lower through hole, washing water is supplied to the hollow portion of the hollow fiber membrane in the upper adhesive fixing portion, the hollow fiber membrane is oscillated by the flow of air and water to peel off suspended matter deposited on the membrane surface, and the separated suspended matter is discharged from a nozzle provided on the side surface of the upper portion of the housing.
When such air cleaning is performed, there is a problem that the hollow fiber membrane is likely to be broken because the hollow fiber membrane swings and stress concentrates on the hollow fiber membrane in the vicinity of the inner surface of the adhesion fixing portion.
In particular, when the bundle of hollow fiber membranes is accommodated in the housing and both ends are fixed by the adhesive fixing portions as described above, the density distribution of the hollow fiber membranes is likely to be varied, and when the hollow fiber membrane module is formed with a large variation, the oscillation of the hollow fiber membranes becomes larger, and as a result, the hollow fiber membranes are likely to be broken.
In order to prevent the variation in the density distribution of the hollow fiber membranes, for example, patent documents 1 to 3 disclose a hollow fiber membrane module in which a regulating member for preventing the variation in the density distribution of the hollow fiber membranes is provided in an adhesion fixing portion at an end portion of a hollow fiber membrane bundle.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 2015-131267
Patent document 2: japanese patent laid-open publication No. 2012 and 045453
Patent document 3: japanese laid-open patent publication No. 2000-185220
Disclosure of Invention
Problems to be solved by the invention
However, as in the hollow fiber membrane modules described in patent documents 1 to 3, for example, in the case where a cross-shaped regulating member is provided at the center of a hollow fiber membrane bundle, the approximate density distribution of the hollow fiber membranes can be adjusted by dividing the interval of the distribution of the hollow fiber membranes by the regulating member, but in practice, it is difficult to make the density of the hollow fiber membranes uniform as a whole, and a portion where the density of the hollow fiber membranes is relatively low is formed.
Further, the shape of the regulating member is not limited to the cross shape, and there is also a method of inserting a plurality of cylindrical regulating members into the hollow fiber membrane bundle. Fig. 6 is a view showing an end face of a hollow fiber membrane bundle in a case where 12 columnar regulating members 41 are inserted and arranged. The plurality of small double circles in fig. 6 are each hollow fiber membranes, and the white portions other than the hollow fiber membranes and the regulating member 41 represent potting materials. As shown in fig. 6, when the regulating member 41 is disposed, the density of the hollow fiber membranes at the central portion (the range of the dotted circle) of the hollow fiber membrane bundle is less dense than that at the outer peripheral portion other than the central portion. When the inside of the cross section of the hollow fiber membrane bundle along the longitudinal direction was checked, it was found that the length of the projection formed on the surface of each hollow fiber membrane by the potting material was longer in the central portion than in the outer peripheral portion. The projection is a portion where the potting material is formed to project from the interface of the potting material in the case along the surface of the hollow fiber membrane. Further, when the protruding portion is long, the hollow fiber membranes cannot be flexibly bent in the vicinity of the interface of the potting material, and therefore, the vibration of the hollow fiber membranes as described above cannot be absorbed, and the breakage of the hollow fiber membranes is further facilitated.
Here, the reason why the length of the protruding portion is longer than the outer peripheral portion in a state where the density of the hollow fiber membranes in the central portion of the hollow fiber membrane bundle is sparse compared to the outer peripheral portion will be described in detail. In the production of the hollow fiber membrane module as described above, the adhesive fixing portion is formed by, for example, centrifugal adhesion. Specifically, the potting material is injected into both end portions of the case, and the case into which the potting material is injected is rotated in the horizontal direction, thereby performing centrifugal bonding. By this centrifugal bonding, most of the potting material is pushed against both sides of the housing to form the bonded and fixed part, but a part of the potting material remains along the surface of each hollow fiber membrane, and the remaining potting material forms the projection.
In the conventional hollow fiber membrane module, since the density of the hollow fiber membranes is low in the central portion of the end face of the hollow fiber membrane bundle as described above, when the potting material is injected, a relatively large amount of the potting material is injected between the hollow fiber membranes in the central portion as compared with between the hollow fiber membranes in the outer peripheral portion. Thus, even if centrifugal bonding is performed, the potting material adhering to the surfaces between the hollow fiber membranes in the central portion does not return to both sides of the hollow fiber membrane bundle, and as a result, the length of the protruding portion in the central portion becomes longer.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a hollow fiber membrane module and a filtration method capable of suppressing breakage of a hollow fiber membrane.
Means for solving the problems of the present invention
The hollow fiber membrane module of the present invention comprises: a hollow fiber membrane bundle formed by bundling a plurality of hollow fiber membranes; a tubular housing for accommodating the hollow fiber membrane bundle; a first adhesive fixing part which adhesively fixes the hollow fiber membranes to each other and the hollow fiber membrane bundle to the inner wall of the housing by a resin material at one end of the hollow fiber membranes; a second adhesive fixing portion for adhering and fixing the hollow fiber membranes and the hollow fiber membrane bundle to the inner wall of the housing through a resin material at the other end of the hollow fiber membranes; and a regulating member that is provided on at least one of the first adhesive fixing portion and the second adhesive fixing portion and regulates an arrangement of the hollow fiber membranes, wherein, when a range of a circle having a center of the end face as a center point and having 1/2, which is a radius of the end face, as a center portion and a range other than the center portion as an outer peripheral portion is set on an end face of at least one of the first adhesive fixing portion and the second adhesive fixing portion outside the housing, a ratio between an area ratio of an entire area of the regulating member and the resin material with respect to the center portion and an area ratio of an entire area of the regulating member and the resin material with respect to the outer peripheral portion is 0.8 or more and 1.2 or less.
In the hollow fiber membrane module of the present invention, it is preferable that the ratio of the total area of the end faces of the thick portions of the hollow fiber membranes included in the central portion to the entire area of the central portion is 50% or more.
In the hollow fiber membrane module of the present invention, it is preferable that the hollow portion of one end of the hollow fiber membrane is closed and the hollow portion of the other end is open.
In the hollow fiber membrane module of the present invention, it is preferable that a ratio between an area ratio of the regulating member and the resin material to an entire area of the central portion and an area ratio of the regulating member and the resin material to an entire area of the outer peripheral portion is 0.8 or more and 1.2 or less at an end surface of the hollow fiber membrane on the case outer side of the first adhesion fixing portion or the second adhesion fixing portion on the end portion side of the opening of the hollow portion.
In the hollow fiber membrane module according to the present invention, it is preferable that the first adhesive fixing portion or the second adhesive fixing portion on the end portion side where the hollow portion of the hollow fiber membrane is closed have at least one through hole for introducing the liquid supplied from the outside of the housing into the space in the housing between the first adhesive fixing portion and the second adhesive fixing portion.
In the hollow fiber membrane module according to the present invention, it is preferable that at least one of the first adhesive fixing portion and the second adhesive fixing portion on the end portion side of the opening of the hollow portion of the hollow fiber membrane has a length from the interface of the resin material in the housing to the protruding portion formed by protruding the resin material from the interface along the surface of the hollow fiber membrane of 20mm or less.
In the hollow fiber membrane module of the present invention, it is preferable that the minimum thickness D0 of the portion having the smallest thickness and the maximum thickness D1 of the portion having the largest thickness of at least one of the first adhesively-fixing part and the second adhesively-fixing part at the end portion side of the opening of the hollow portion of the hollow fiber membrane satisfy D1 ≦ 120% × D0.
In the hollow fiber membrane module of the present invention, it is preferable that the regulating member has a cylindrical shape.
In the hollow fiber membrane module of the present invention, it is preferable that the regulating member is disposed on both the central portion and the outer peripheral portion.
The filtration method of the present invention is characterized by performing filtration using the hollow fiber membrane module of the present invention.
Effects of the invention
According to the hollow fiber membrane module of the present invention, the hollow fiber membrane and the restriction member are configured such that: in at least one of the first adhesive fixing portion and the second adhesive fixing portion of the hollow fiber membrane module, the ratio of the area ratio of the limiting member and the resin material to the entire area of the central portion to the area ratio of the limiting member and the resin material to the entire area of the outer peripheral portion is 0.8 or more and 1.2 or less, and therefore the length of the protruding portion formed on the hollow fiber membrane in the central portion can be shortened, and thus the breakage of the hollow fiber membrane can be suppressed.
Drawings
Fig. 1 is a schematic configuration diagram showing one embodiment of a hollow fiber membrane module of the present invention.
Fig. 2 is a cross-sectional view of the hollow fiber membrane module shown in fig. 1 taken along line C-D.
Fig. 3 is a schematic view of an end face of the second adhesive fixing portion of the hollow-fiber membrane module shown in fig. 1 as viewed from the direction of arrow a.
Fig. 4 is a diagram for explaining the length of the protruding portion and the thickness of the adhesion fixing portion.
Fig. 5 is a view showing an external appearance of a protective member provided in a housing.
Fig. 6 is a view showing an end face of a second adhesion-fixing portion of the hollow-fiber membrane module of comparative example 1.
Detailed Description
Hereinafter, an embodiment of the hollow fiber membrane module of the present invention will be described with reference to the drawings. The hollow fiber membrane module of the present embodiment is used in various fields such as plumbing, food industry, general industry, medical treatment, and physical chemistry. Fig. 1 is a diagram showing a schematic structure of a hollow fiber membrane module according to the present embodiment. In fig. 1, the vertical direction is indicated by an arrow. Hereinafter, the vertical direction shown in fig. 1 will be described as the vertical direction of the hollow fiber membrane module 1.
As shown in fig. 1, a hollow fiber membrane module 1 of the present embodiment includes a hollow fiber membrane bundle 3 in which a plurality of hollow fiber membranes 2 are bundled, and a cylindrical housing 5 in which the hollow fiber membrane bundle 3 is housed. Fig. 1 is a cross-sectional view of the case 5 and the covers 10 and 11 described later, with approximately the first half removed.
As the hollow fiber membrane 2, a reverse osmosis membrane, a nanofiltration membrane, an ultrafiltration membrane, and a microfiltration membrane can be used. The material of the hollow fiber membrane is not particularly limited, and examples thereof include polysulfone, polyethersulfone, polyacrylonitrile, polyimide, polyetherimide, polyamide, polyetherketone, polyetheretherketone, polyethylene, polypropylene, poly (4-methylpentene), ethylene-vinyl alcohol copolymer, cellulose acetate, polyvinylidene fluoride, ethylene-tetrafluoroethylene copolymer, polytetrafluoroethylene, and the like, and a composite material thereof can also be used.
The hollow fiber membrane preferably has an inner diameter of 50 to 3000 μm, more preferably 500 to 2000 μm. Further, it is preferable to use a hollow fiber membrane having an inner diameter/outer diameter ratio of 0.3 to 0.8.
Pipe connection covers 10 and 11 are provided at openings at both ends of the housing 5, respectively, and pipes 10a and 11a for connecting pipes are formed thereon, and the pipe connection covers 10 and 11 are fixedly attached to the housing 5 by a jig 13. Annular grooves are formed in the end surfaces of the covers 10 and 11 on the case 5 side and the end surfaces of the covers 10 and 11 on the case 5 side, and a sanitary pad (sanitary gask) 12 is sandwiched between the grooves. The sanitary gasket 12 seals between both ends of the housing and the covers 10 and 11.
The housing 5 is configured by joining a first cylindrical member 51, a second cylindrical member 52 integrally molded with the nozzle 52a, and a straight-tube-shaped third cylindrical member 53 disposed between the first cylindrical member 51 and the second cylindrical member 52 to each other. The nozzle 52a is provided on a side portion of the upper end of the housing 5, and is provided so as to protrude in a direction orthogonal to the longitudinal direction of the housing 5. The nozzle 52a is a nozzle for discharging the concentrated water during the external pressure filtration process.
The hollow fiber membrane module 1 of the present embodiment is installed upright such that the longitudinal direction thereof is the vertical direction, and is installed such that the nozzle 52a is disposed on the upper side in the vertical direction.
As shown in fig. 1, a flow-regulating tube 7 is attached to an upper end (nozzle 52a side) of the hollow fiber membrane bundle 3. The rectifying cylinder 7 is formed in a cylindrical shape, is provided between the opening on the inner wall side of the housing 5 of the nozzle 52a and the hollow fiber membrane bundle 3, and is provided so as to surround the outer periphery of the hollow fiber membrane bundle 3. The rectifying cylinder 7 is provided in order to secure a space between the hollow fiber membrane bundle 3 and the inner wall of the housing 5 in the vicinity of the nozzle 52 a. This can suppress the hollow fiber membranes 2 from swinging toward the nozzle 52a side when the concentrated water is discharged from the nozzle 52a, and can suppress the breakage of the hollow fiber membranes 2.
As shown in fig. 1, the rectifying cylinder 7 is provided with a plurality of through holes 30. Preferably, the through hole 30 of the rectifying cylinder 7 is formed in a region other than a region facing the opening on the inner surface side of the casing 5 of the nozzle 52a, but not in a region facing the opening.
The rectifying cylinder 7 includes a flange 7a, and the rectifying cylinder 7 is positioned by sandwiching the flange 7a by a joint portion between the second cylindrical member 52 and the third cylindrical member 53. The upper end of the rectifying cylinder 7 is fixed by adhesion in a second adhesion fixing portion 21 described later.
First adhesive fixing portions 20 and second adhesive fixing portions 21 for adhesively fixing the hollow fiber membranes 2 to each other and the hollow fiber membrane bundle 3 to the inner wall of the housing 5 with potting material (corresponding to the resin material of the present invention) are formed at both end portions of the hollow fiber membrane bundle 3. Annular uneven portions 5a are formed on the inner walls of both end portions of the housing 5, and a potting material flows into the grooves of the annular uneven portions 5a, thereby forming an annular uneven structure on the side surfaces of the first adhesion fixing portion 20 and the second adhesion fixing portion 21. By forming the annular uneven portion 5a on the inner wall of the case 5 in this way, the bonding area between the case 5 and the first and second adhesive fixing portions 20 and 21 can be increased, and a higher bonding force can be obtained.
As the potting material, a polymer material such as an epoxy resin, a vinyl ester resin, a polyurethane resin, an unsaturated polyester resin, an olefin polymer, a silicone resin, and a fluorine-containing resin is preferable, and any of these polymer materials may be used, or a plurality of polymer materials may be used in combination.
A region 5b (hereinafter referred to as an outer region) into which the water to be treated flows is formed outside the hollow fiber membranes 2 between the first adhesive fixing portion 20 and the second adhesive fixing portion 21 formed at both ends of the hollow fiber membrane bundle 3.
As shown in fig. 1, a plurality of through holes 20a are formed in the first adhesive fixing portion 20 located on the lower side when the hollow fiber membrane module 1 is erected in the vertical direction. Fig. 2 is a cross-sectional view of the hollow fiber membrane module 1 shown in fig. 1 taken along line C-D.
The through hole 20a is formed parallel to the longitudinal direction of the housing 5, and is a hole that communicates the outer region 5b with the outer region 5c on the opposite side thereof via the first adhesive fixing portion 20. In the present embodiment, as shown in fig. 2, the plurality of through holes 20a are formed so as to be uniformly distributed in the first adhesive fixing portion 20. The through holes 20a are preferably formed to be uniformly distributed in the first adhesive fixing portion 20 as in the present embodiment, but are not limited thereto, and may be arranged in other positions.
The hollow portion of each hollow fiber membrane 2 on the side where the through-hole 20a is provided is closed, and the hollow portion of each hollow fiber membrane 2 on the side opposite to the side where the through-hole 20a is formed is open. In the filtration process, water to be treated (liquid to be treated) flows in from the pipe line 11a of the cover 11 provided outside the first adhesive fixing portion 20, and the water to be treated is supplied to the outer region 5b through the through hole 20 a.
Then, the water to be treated supplied to the outer region 5b permeates through the protective member 8, penetrates through the outer surfaces of the hollow fiber membranes 2, and the filtered water having passed through the hollow portions of the hollow fiber membranes 2 flows out through the pipe 10a of the lid 10, and the concentrated water flows out through the nozzle 52 a.
Here, in the hollow fiber membrane module 1 of the present embodiment, after being used for the external pressure filtration treatment as described above, a cleaning treatment by air washing is periodically performed. Specifically, the washing water is supplied from the upper second adhesive fixing section 21 side, air is supplied to the through-holes 20a of the lower first adhesive fixing section 20, and the two supplied fluids are discharged from the nozzles 52a of the second tubular member 52, whereby the hollow fiber membranes 2 are shaken to remove the dirt adhering to the membrane surfaces. When this air washing is performed, there is a problem that each hollow fiber membrane 2 in the vicinity of the second adhesive fixing portion 21 is easily broken due to its shaking.
In particular, in the conventional hollow fiber membrane module, since the position of the hollow fiber membrane is regulated by using the regulating member in the second adhesive fixing portion on the upper side, the density of the hollow fiber membrane in the central portion is lowered on the end face of the second adhesive fixing portion, and thus the length of the protruding portion is increased when the second adhesive fixing portion is formed, which causes a problem that the hollow fiber membrane is easily broken. As described above, the projection is a portion where the potting material is formed to project from the interface of the potting material along the surface of the hollow fiber membrane 2.
Therefore, in the hollow fiber membrane module 1 of the present embodiment, the hollow fiber membranes 2 are arranged such that the density of the hollow fiber membranes 2 is uniform throughout the end face of the second adhesive fixing portion 21 on the outer side of the housing 5.
Fig. 3 is a schematic view of an end face of the second adhesive fixing portion 21 of the hollow-fiber membrane module 1 shown in fig. 1 as viewed from the direction of arrow a.
In the hollow fiber membrane module 1 of the present embodiment, as shown in fig. 3, a cylindrical regulating member 40 is provided in the second adhesive fixing portion 21. The regulating member 40 is a cylindrical member formed of resin. On the end face of the second adhesive fixing portion 21 shown in fig. 3, white portions other than the hollow fiber membranes 2 and the regulating member 40 represent potting materials.
In the hollow fiber membrane module 1 of the present embodiment, the 8 restricting members 40 are arranged so as to be uniformly distributed over the entire end surface of the hollow fiber membrane bundle 3.
The hollow fiber membrane 2 and the regulating member 40 are arranged such that: when a circle having a center at the center of the end face and a radius of 1/2 equal to the radius of the end face is defined as a central portion and a range other than the central portion is defined as an outer peripheral portion, the ratio of the area ratio of the regulating member 40 and the potting material to the entire area of the central portion to the area ratio of the regulating member 40 and the potting material to the entire area of the outer peripheral portion is 0.8 to 1.2, on the end face of the second adhesive fixing portion 21 on the outer side of the housing 5. The range of the circle indicated by the broken line in fig. 3 is the central portion, and the range outside the central portion other than the central portion is the outer peripheral portion. In the present embodiment, the regulating member 40 is disposed on both the central portion and the outer peripheral portion.
As shown in fig. 3, by arranging the hollow fiber membranes 2 so that the density of the hollow fiber membranes 2 is uniform over the entire end face of the second adhesive fixing portion 21 and the density of the hollow fiber membranes 2 in the central portion is higher than that in the conventional art, the length of the protruding portion can be shortened when the second adhesive fixing portion 21 is formed, and therefore the hollow fiber membranes 2 can be made less likely to break. The reason why the length of the protruding portion can be shortened will be described later.
In addition, it is preferable that the ratio of the total area of the end faces of the thick portions of the hollow fiber membranes 2 included in the central portion to the entire area of the central portion is 50% or more of the end faces of the second adhesive fixing portions 21.
The length of the projection from the interface of the potting material is preferably 20mm or less. Here, the interface of the potting material refers to the surface of the potting material except for the projection formed between the adjacent hollow fiber membranes 2. The length of the protruding portion referred to herein is the length of the longest protruding portion among the plurality of protruding portions formed along each hollow fiber membrane 2. Fig. 4 is a schematic view of the projection 50. In fig. 4, the range of P indicated by oblique lines is the potting material, and the portion indicated by oblique lines above the interface S of the potting material P is the projection 50. The length L of the longest protrusion 50 among the protrusions 50 of each hollow fiber membrane 2 is preferably 20mm or less. More preferably 5mm or less.
Further, as for the thickness of the second adhesive securing part 21, it is preferable that the minimum thickness D0 of the smallest portion and the maximum thickness D1 of the largest portion thereof satisfy D1 ≦ 120% × D0. That is, the thickness of the second adhesive securing part 21 is preferably small in variation. The thickness of the second adhesive fixing portion 21 is, as shown in fig. 4, the thickness from an end surface 21a of the second adhesive fixing portion 21 on the outer side of the case 5 to an interface S of the potting material forming the second adhesive fixing portion 21. Fig. 4 shows a case where the minimum thickness D0 is equal to the maximum thickness D1.
In addition, as described above, in the conventional hollow fiber membrane module, since the density of the hollow fiber membranes is low in the central portion of the end face of the hollow fiber membrane bundle, when the potting material is injected, a relatively large amount of the potting material is injected between the hollow fiber membranes in the central portion as compared with between the hollow fiber membranes in the outer peripheral portion, and thus the thickness of the central portion of the adhesion fixing portion is thicker than that of the outer peripheral portion, that is, variation in the thickness of the adhesion fixing portion becomes large. When the variation in thickness of the adhesion fixing portion is large as described above, there is a problem such as a poor local withstand voltage, but this problem can be solved by reducing the variation in thickness of the adhesion fixing portion as described above.
Next, the hollow fiber membrane module 1 includes a cylindrical protective member 8 provided so as to surround the outer peripheral surface of the hollow fiber membrane bundle 3. Fig. 5 is a view showing an external appearance of the protective member 8 provided in the housing 5. In fig. 5, the hollow fiber membrane bundle 3 and the rectifying cylinder 7 shown in fig. 1 are not shown. In fig. 1, the protection member 8 is not shown.
As shown in fig. 5, in the present embodiment, a protective member 8 is provided so as to surround substantially the entire outer peripheral surface of the hollow fiber membrane bundle 3. The protective member 8 used in the present embodiment is a member formed by cylindrically forming the mesh member shown in fig. 5, and has flexibility. As the material of the mesh-like protective member 8, a material having heat resistance such as PFA (tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer), FEP (tetrafluoroethylene-hexafluoropropylene copolymer (4-6 fluorination)), ETFE (tetrafluoroethylene-ethylene copolymer), PTFE (polytetrafluoroethylene (4 fluorination)), polysulfone, or the like is preferably used.
Both ends of the protective member 8 are positioned in the first adhesive fixing portion 20 and the second adhesive fixing portion 21, respectively, and fixed by the first adhesive fixing portion 20 and the second adhesive fixing portion 21.
Next, a method for producing the hollow fiber membrane module 1 according to the above embodiment will be described in detail.
First, a predetermined number of hollow fiber membranes 2 are bundled to produce a hollow fiber membrane bundle 3. Next, the opening at one end of each hollow fiber membrane 2 of the hollow fiber membrane bundle 3 is filled with a sealant and sealed. As the sealant, for example, a hot melt adhesive is used, but other materials may be used.
Next, the first cylindrical member 51 and the second cylindrical member 52 are joined to both ends of the 3 rd cylindrical member 53 to form the case 5, and the rectifying cylinder 7 is attached to form the module case main body. Then, the outer periphery of the hollow fiber membrane bundle 3 whose one end opening is sealed is surrounded by the protective member 8, and the hollow fiber membrane bundle 3 surrounded by the protective member 8 is inserted into the housing 5. At this time, the side where the hollow portion of the hollow fiber membrane bundle 3 is sealed is inserted so as to be positioned on the second cylindrical member 52 side.
Then, the regulating member 40 is inserted into the end portion of the hollow fiber membrane bundle 3 on the second cylindrical member 52 side, and the arrangement of the hollow fiber membranes 2 is adjusted as described above so that the density of the hollow fiber membranes 2 becomes uniform at the end portion. On the other hand, a columnar member is inserted into an end portion of the hollow fiber membrane bundle 3 on the first tubular member 51 side at a position where the through hole 20a is to be formed.
Next, a container for forming an adhesive fixing portion is attached to both ends of the case 5, and a potting material is injected to both ends of the case 5. Then, the housing 5 filled with the potting material is rotated in the horizontal direction to perform centrifugal bonding. By this centrifugal bonding, most of the potting material is brought into contact with both sides of the housing 5, thereby forming the first adhesive fixing portion 20 and the second adhesive fixing portion 21, but a part of the potting material remains along the surface of each hollow fiber membrane 2, and a projection is formed by this remaining potting material.
In the conventional hollow fiber membrane module, since the density of the hollow fiber membranes is low in the central portion of the end face of the hollow fiber membrane bundle as described above, when the potting material is injected, a relatively large amount of the potting material is injected between the hollow fiber membranes in the central portion as compared with between the hollow fiber membranes in the outer peripheral portion. Thus, even if centrifugal bonding is performed, the potting material adhering to the surfaces between the hollow fiber membranes in the central portion does not return to both sides of the hollow fiber membrane bundle, and as a result, the length of the protruding portion becomes longer, and the hollow fiber membranes are easily broken in the vicinity of the protruding portion when the above-described air washing is performed.
In the present embodiment, since the arrangement of each hollow fiber membrane 2 and the regulating member 40 is adjusted so that the density of the hollow fiber membranes 2 becomes uniform on the end face of the hollow fiber membrane bundle 3 as described above, the density of each hollow fiber membrane 2 in the central portion of the hollow fiber membrane bundle 3 can be made higher than that in the conventional art, and thus, when the second adhesive fixing portion 21 is formed, it is possible to prevent relatively more potting material from being injected between the hollow fiber membranes in the central portion. Therefore, the length of the protruding portion can be shortened, and the hollow fiber membranes 2 can be made less likely to break.
After the first adhesive fixing portion 20 and the second adhesive fixing portion 21 are formed, the columnar member on the first adhesive fixing portion 20 side is removed to form a plurality of through holes 20 a. The hollow portion of the hollow fiber membrane bundle 3 on the first cylindrical member 51 side is closed with a potting material. After the potting material is cured, complete curing at high temperature may also be performed as required.
After confirming that the potting material in the case 5 is solidified, the adhesive fixing portion forming container is removed, and the end portion of the second adhesive fixing portion 21 on the second cylindrical member 52 side is cut to open the hollow portion of the hollow fiber membrane bundle 3.
Finally, after the caps 10 and 11 for pipe connection are attached to the respective end portions of the housing 5 to which the hollow fiber membrane bundle 3 is adhesively fixed via the sanitary pad 12 and fastened and fixed by the jig 13, leak inspection, test run, and the like are performed to confirm that the production meets the specifications, thereby completing the hollow fiber membrane module 1.
In the present embodiment, centrifugal bonding is performed, but the present invention is not limited to this, and the first adhesive fixing portion 20 and the second adhesive fixing portion 21 may be formed by performing static bonding in which the longitudinal direction of the case 5 is arranged in the vertical direction and the potting material is injected from the lower end of the case 5.
The distal end portion of the regulating member 40 provided in the second adhesive fixing portion 21 is preferably tapered, for example, so as to be tapered in the longitudinal direction. This can improve the insertion property into the hollow fiber membrane bundle 3. In addition, when the regulating member 40 is inserted into the hollow fiber membrane bundle 3, the surface of the hollow fiber membranes 2 can be prevented from being damaged.
The cross-sectional shape of the regulating member 40 is not particularly limited, and examples thereof include a polygonal shape such as a circle, an ellipse, a quadrangle, a hexagon, and a fan, and a plate shape, but a circle or an ellipse is preferable that does not damage the hollow fiber membranes 2 when the hollow fiber membrane bundle 3 is inserted.
In addition, the columnar member provided in the first adhesive fixing portion 20 is preferably longer than the thickness of the first adhesive fixing portion 20 in order to draw out and form the through hole 20a after the adhesion is completed as described above.
The distal end portion of the columnar member is preferably tapered, for example, so as to be tapered in the longitudinal direction. By forming the tip portion of the columnar member in a tapered shape in this manner, the drawability when forming the through hole 20a can be improved.
The cross-sectional shape of the columnar member is also not particularly limited, and examples thereof include a polygonal shape such as a circle, an ellipse, a quadrangle, a hexagon, and a fan, and a plate shape, but a circle or an ellipse that does not damage the hollow fiber membranes 2 when the hollow fiber membrane bundle 3 is inserted is preferable.
The material of the columnar member may be a polymer material, an inorganic material, a metal material, or the like, but is not particularly limited, and is preferably a material having a weak adhesion to the potting material and having a peelable structure. Specifically, the columnar member preferably has a circular or elliptical cross-sectional shape in the longitudinal direction.
In addition, although the hollow fiber membrane module 1 of the present embodiment is an external pressure type hollow fiber membrane module having the through hole 20a in the first adhesion fixing portion 20 and the regulating member 40 is provided only in the second adhesion fixing portion 21, the present invention can be applied to other hollow fiber membrane modules. Specifically, the present invention can be applied to, for example, an external pressure type hollow fiber membrane module in which water to be treated is caused to flow in from a nozzle formed in a side surface of a casing, and in this case, the restricting members may be provided on the adhesive fixing portions at both ends.
Further, the hollow fiber membrane and the restriction member may be configured such that: the ratio between the area ratio of the regulating member and the potting material to the entire area of the central portion and the area ratio of the regulating member and the potting material to the entire area of the outer peripheral portion is 0.8 to 1.2 at the end surfaces of the adhesive fixing portions at both end portions.
Further, as in the hollow fiber membrane module 1 of the above-described embodiment, when the hollow fiber membrane module is used by being assembled to a water treatment apparatus and being vertically installed as an outlet side of filtered water of an external pressure type hollow fiber membrane module, it is more preferable that the length of the protruding portion is 20mm or less in the second adhesive fixing portion 21 disposed on the upper side. That is, the length of the protruding portion is preferably 20mm or less in the adhesion fixation portion on the end portion side where the hollow portion of the hollow fiber membrane is opened.
Further, as for the thicknesses of the first adhesively-fixed part 20 and the second adhesively-fixed part 21, as in the hollow fiber membrane module 1 of the above-described embodiment, it is more preferable that the minimum thickness D0 and the maximum thickness D1 of the second adhesively-fixed part 21 on the end portion side of the hollow portion opening of the hollow fiber membrane 2 satisfy D1 ≦ 120% × D0, but not limited thereto, and for example, when the hollow portion of the hollow fiber membrane is opened in both the first adhesively-fixed part and the second adhesively-fixed part, it is preferable that both the minimum thickness D0 and the maximum thickness D1 satisfy D1 ≦ 120% × D0 in both the first adhesively-fixed part and the second adhesively-fixed part. That is, it is preferable that the minimum thickness D0 and the maximum thickness D1 satisfy D1 ≦ 120% × D0 in the adhesively-fixed part on the end portion side where the hollow portion of the hollow fiber membrane is opened.
The present invention may be applied to at least one of the adhesion-fixing portions of the internal-pressure hollow-fiber membrane module.
Example 1
Next, examples and comparative examples of the hollow fiber membrane module of the present invention will be explained.
(example 1)
11000 hollow fiber membranes (manufactured by Asahi chemical Co., Ltd.) made of PVDF (polyvinylidene fluoride) with one end having a closed hollow part were bundled and inserted into a casing having a second cylindrical member to which a rectifying cylinder having an inner diameter of 154mm was attached. The hollow fiber membrane used had an average pore diameter of 0.1 μm, an inner diameter of 0.6mm and an outer diameter of 1.0 mm.
Next, as shown in fig. 3, 8 cylindrical regulating members 40 having an outer diameter of 11mm were inserted and arranged in a uniformly distributed manner at the end of the hollow fiber membrane bundle on the side where the hollow portion was closed (the second cylindrical member side) (an adhesive similar to a potting material described below was cast in a mold in advance and cured). On the other hand, a columnar member is inserted into an end portion of the hollow fiber membrane bundle on the first tubular member side at a position where a through hole is to be formed.
Next, the container for forming an adhesion fixing portion to which the tube for introducing a potting material is attached is fixed to both ends of the housing 5, and the potting material is injected into the first cylindrical member and the second cylindrical member of the housing while being rotated in the horizontal direction. As the potting material, a two-part thermosetting urethane resin (manufactured by SANYU REC Co., Ltd.: SA-6330A2/SA-6330B5 (trade name)) was used. When the potting material stops fluidizing by the curing reaction, the centrifuge is stopped from rotating and taken out, and the potting material is heated to 50 ℃ in a thermostat to be cured.
Then, the end of the case on the second cylindrical member side is cut off, and the hollow portion opening on the side where the hollow portion is closed at the stage before bonding. On the other hand, the columnar member is removed from the first adhesive fixing portion on the first cylindrical member side to form a plurality of through holes.
In this case, when a circle formed by connecting the hollow fiber membranes present on the outermost periphery of the cut end face of the second adhesive fixing portion is defined as a cut end face circle, a range of a circle having a center of the cut end face circle and a radius of 1/2, which is a radius of the cut end face circle, is defined as a central portion, and a range other than the central portion is defined as an outer periphery, the area ratios of the potting material and the regulating member in the central portion and the outer periphery are 46.5% and 47.4%, respectively. That is, the ratio between the area ratio of the potting material and the regulating member in the central portion and the area ratio of the potting material and the regulating member in the outer peripheral portion was 1.0.
The area ratio of the potting material and the regulating member was determined by the following method. First, the cut end surface is photographed in a macro mode with a digital camera at a place having an illuminance of 500 lux or more and a setting of 200 ten thousand pixels or more. Then, the obtained photo data is converted into a black-and-white image by opening image analysis software Win Roof 6.1.3 and using a "black-and-white imaging" command. Next, the color tone is reversed by the "reverse" command, only the cut end face circle is selected, and the contrast is enhanced by "100" by the "brightness/contrast" command. Further, the image is binarized at the threshold value "140" by the "binarization by a single threshold value" command of the "binarization processing", and the area ratio is selected and executed by the "total area/number of measurements" command, thereby obtaining the value of the area ratio.
Next, the hollow fiber membrane module was attached to a filtration apparatus with the open side of the hollow portion as the top, and the following physical cleaning durability test was performed. The membrane effective length of the hollow fiber membrane module was 2 m.
8m from the upper second adhesive fixing part side3Supply washing water at a flow rate of 7 m/hr3The flow rate of/hr supplies air to the through hole of the first adhesive fixing portion on the lower side. The two fluids supplied are discharged from the nozzle of the second cylindrical member on the upper side. The above operation was continuously performed except for the leak test performed every month. In addition, the water temperature was maintained at 5 ℃ during the run.
After 6 months of operation, leakage due to breakage of 5 hollow fiber membranes occurred.
After the test, the membrane module was disassembled and the state of the second adhesive-fixing part on the filtration side was confirmed, the thickness of the second adhesive-fixing part on the filtration side was in the range of 33mm to 37mm, and the length of the protruding part was 10mm at the maximum.
Comparative example 1
11000 hollow fiber membranes (manufactured by Asahi chemical Co., Ltd.) made of PVDF (polyvinylidene fluoride) with one end having a closed hollow part were bundled and inserted into a casing having a second cylindrical member to which a rectifying cylinder having an inner diameter of 154mm was attached. The hollow fiber membrane used had an average pore diameter of 0.1 μm, an inner diameter of 0.6mm and an outer diameter of 1.0 mm.
Next, as shown in fig. 6, 12 cylindrical regulating members 41 having an outer diameter of 11mm were inserted and arranged at the end of the hollow fiber membrane bundle on the side where the hollow portion was closed (an adhesive similar to a potting material described below was cast into a mold in advance and cured). Fig. 6 is a view showing an end face of the second adhesive fixing portion of the finally manufactured hollow-fiber membrane module. On the other hand, a columnar member is inserted into an end portion of the hollow fiber membrane bundle on the first tubular member side at a position where a through hole is to be formed.
Next, the container for forming an adhesion fixing portion to which the tube for introducing a potting material is attached is fixed to both ends of the housing 5, and the potting material is injected into the first cylindrical member and the second cylindrical member of the housing while being rotated in the horizontal direction. As the potting material, a two-part thermosetting urethane resin (manufactured by SANYU REC Co., Ltd.: SA-6330A2/SA-6330B5 (trade name)) was used. When the potting material stops fluidizing by the curing reaction, the centrifuge is stopped from rotating and taken out, and the potting material is heated to 50 ℃ in a thermostat to be cured.
Then, the end of the case on the second cylindrical member side is cut off, and the hollow portion opening on the side where the hollow portion is closed at the stage before bonding. On the other hand, the columnar member is removed from the first adhesive fixing portion on the first cylindrical member side to form a plurality of through holes.
In this case, when a circle formed by connecting the hollow fiber membranes present on the outermost periphery of the cut end face of the second adhesive fixing portion is defined as a cut end face circle, a range of a circle having a center of the cut end face circle and a radius of 1/2, which is a radius of the cut end face circle, is defined as a central portion, and a range other than the central portion is defined as an outer periphery, the area ratios of the potting material and the regulating member in the central portion and the outer periphery are 60.9% and 48.3%, respectively. That is, the ratio between the area ratio of the potting material and the regulating member in the central portion and the area ratio of the potting material and the regulating member in the outer peripheral portion was 0.79. The range of the dotted circle shown in fig. 6 is the central portion, and the other ranges are the outer peripheral portions.
Next, the hollow fiber membrane module was attached to a filtration apparatus with the open side of the hollow portion as the top, and the following physical cleaning durability test was performed. The membrane effective length of the hollow fiber membrane module was 2 m.
8m from the upper second adhesive fixing part side3Supply washing water at a flow rate of 7 m/hr3The flow rate of/hr supplies air to the through hole of the first adhesive fixing portion on the lower side. The two fluids supplied are discharged from the nozzle of the second cylindrical member on the upper side. The above operation was continuously performed except for the leak test performed every month. In addition, the water temperature was maintained at 5 ℃ during the run.
After 6 months of operation, leakage due to rupture of 50 membranes occurred.
After the test, the membrane module was disassembled and the state of the second adhesive-fixing part on the filtration side was confirmed, the thickness of the second adhesive-fixing part on the filtration side was in the range of 29mm to 40mm, and the length of the protruding part was 22mm at the maximum.
Description of the reference numerals
1 hollow fiber membrane module
2 hollow fiber membrane
3 hollow fiber membrane bundle
5 casing
5a annular uneven part
5b outer region
5c outer region
7 rectifying cylinder
7a flange
8 protective component
10. 11 cover
10a, 11a pipeline
12 sanitary pad
13 clamping apparatus
20 first adhesive fixing part
20a through hole
21 second adhesive fixing part
30 through hole
40 limiting member
41 limiting member
50 projection
52a nozzle
P potting material
S interface of potting material.
Claims (10)
1. A hollow fiber membrane module having:
a hollow fiber membrane bundle formed by bundling a plurality of hollow fiber membranes;
a tubular housing for accommodating the hollow fiber membrane bundle;
a first adhesive fixing portion that adhesively fixes the hollow fiber membranes to each other and the hollow fiber membrane bundle to the housing inner wall with a resin material at one end portion of the hollow fiber membranes;
a second adhesive fixing portion that adhesively fixes the hollow fiber membranes to each other and the hollow fiber membrane bundle to the inner wall of the housing with a resin material at the other end portions of the hollow fiber membranes; and
a regulating member that is provided in at least one of the first adhesive fixing portion and the second adhesive fixing portion and regulates the arrangement of the hollow fiber membranes,
in the case where a range of a circle having a center at a center of the end face and a radius of 1/2 of the radius of the end face is a central portion and a range other than the central portion is an outer peripheral portion, on the end face on the outer side of the housing of at least one of the first adhesive fixing portion and the second adhesive fixing portion, a ratio between an area ratio of the entire area of the restriction member and the resin material with respect to the central portion and an area ratio of the entire area of the restriction member and the resin material with respect to the outer peripheral portion is 0.8 or more and 1.2 or less.
2. The hollow fiber membrane module according to claim 1, wherein a ratio of a total area of end faces of the thick-walled portions of the hollow fiber membrane included in the central portion to an entire area of the central portion is 50% or more.
3. The hollow fiber membrane module according to claim 1 or 2, wherein the hollow portion of one end portion of the hollow fiber membrane is closed, and the hollow portion of the other end portion is open.
4. A hollow fiber membrane module according to claim 3, wherein a ratio between an area ratio of the restricting member and the resin material to an entire area of the central portion and an area ratio of the restricting member and the resin material to an entire area of the outer peripheral portion is 0.8 or more and 1.2 or less on an end surface of the first adhesion fixing portion or the second adhesion fixing portion on an end portion side of a hollow portion opening of the hollow fiber membrane on the case outer side.
5. The hollow fiber membrane module according to any one of claims 1 to 4, wherein the first adhesive fixing portion or the second adhesive fixing portion on the end portion side where the hollow portion of the hollow fiber membrane is closed has at least one through hole for introducing a liquid supplied from the outside of the housing into a space inside the housing between the first adhesive fixing portion and the second adhesive fixing portion.
6. The hollow-fiber membrane module according to any one of claims 1 to 4, wherein a length of a protruding portion of the resin material protruding from an interface of the resin material in the housing along a surface of the hollow-fiber membrane from the interface is 20mm or less in at least one of the first adhesive fixing portion and the second adhesive fixing portion on the end portion side of the hollow opening of the hollow fiber membrane.
7. The hollow-fiber membrane module according to any one of claims 1 to 4, wherein a minimum thickness D0 of a portion having a smallest thickness and a maximum thickness D1 of a portion having a largest thickness of at least one of the first and second adhesive-fixing portions at an end portion side of a hollow opening of the hollow-fiber membrane satisfy D1. ltoreq.120% × D0.
8. The hollow fiber membrane module according to any one of claims 1 to 7, wherein the restriction member has a cylindrical shape.
9. The hollow fiber membrane module according to claim 8, wherein the regulating member is disposed on both the central portion and the outer peripheral portion.
10. A filtration method using the hollow fiber membrane module according to any one of claims 1 to 9.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017120509 | 2017-06-20 | ||
| JP2017-120509 | 2017-06-20 | ||
| PCT/JP2018/023481 WO2018235871A1 (en) | 2017-06-20 | 2018-06-20 | Hollow fiber membrane module and filtration method |
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| Publication Number | Publication Date |
|---|---|
| CN111093812A true CN111093812A (en) | 2020-05-01 |
| CN111093812B CN111093812B (en) | 2022-08-23 |
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| CN201880041118.5A Active CN111093812B (en) | 2017-06-20 | 2018-06-20 | Hollow fiber membrane module and filtration method |
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| Country | Link |
|---|---|
| US (1) | US11364469B2 (en) |
| JP (1) | JP6751818B2 (en) |
| CN (1) | CN111093812B (en) |
| WO (1) | WO2018235871A1 (en) |
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| CN110290856B (en) * | 2017-02-10 | 2022-06-10 | 旭化成株式会社 | Hollow fiber membrane module and filtration method |
| JP7337955B2 (en) * | 2019-12-19 | 2023-09-04 | 旭化成株式会社 | Hollow fiber membrane module and manufacturing method |
| CN114288858A (en) * | 2022-01-24 | 2022-04-08 | 珠海格力电器股份有限公司 | Compound filter element group spare and water purification system |
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- 2018-06-20 JP JP2019525665A patent/JP6751818B2/en active Active
- 2018-06-20 CN CN201880041118.5A patent/CN111093812B/en active Active
- 2018-06-20 US US16/613,808 patent/US11364469B2/en active Active
- 2018-06-20 WO PCT/JP2018/023481 patent/WO2018235871A1/en active Application Filing
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| US6331248B1 (en) * | 1995-09-21 | 2001-12-18 | Asahi Kasei Kogyo Kabushiki Kaisha | Hollow fiber membrane module |
| JP2008514237A (en) * | 2004-09-30 | 2008-05-08 | バイヤー ヘルスケア エルエルシー | Apparatus and method for consistent and continuous production of biomolecules |
| CN101234294A (en) * | 2006-11-14 | 2008-08-06 | 旭化成化学株式会社 | Filtering film component |
| CN102026711A (en) * | 2008-07-01 | 2011-04-20 | 东丽株式会社 | Submerged hollow fiber membrane module |
| CN201470318U (en) * | 2009-08-26 | 2010-05-19 | 上海浩滤特膜技术有限公司 | Column-type hollow fiber ultrafiltration membrane component with sidestep-type end head structure |
| JP2012045453A (en) * | 2010-08-24 | 2012-03-08 | Asahi Kasei Chemicals Corp | Hollow fiber membrane module and filtration method |
| JP2014147860A (en) * | 2013-01-31 | 2014-08-21 | Asahi Kasei Chemicals Corp | Selection method of adhesive at adhered and fixed portion of hollow fiber membrane module, manufacturing method of hollow fiber membrane module, and hollow fiber membrane module |
| CN104772041A (en) * | 2014-01-10 | 2015-07-15 | 旭化成化学株式会社 | Hollow fiber membrane module and filtering method |
Also Published As
| Publication number | Publication date |
|---|---|
| US11364469B2 (en) | 2022-06-21 |
| WO2018235871A1 (en) | 2018-12-27 |
| JPWO2018235871A1 (en) | 2019-11-07 |
| US20200171438A1 (en) | 2020-06-04 |
| CN111093812B (en) | 2022-08-23 |
| JP6751818B2 (en) | 2020-09-09 |
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